求大神帮忙啊。。。。
NumPorts = 10000;
frontcon(ExpReturn, ExpCovariance, NumPorts);%(作出有效边界)portopt
RisklessRate = 0.043274
BorrowRate = NaN
RiskAversion = []
portalloc (PortRisk, PortReturn, PortWts, RisklessRate, BorrowRate, RiskAversion);
一直无法做出有效集合的切线。。。